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      nginx部署flask项目
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        <h3 id="Flask部署"><a href="#Flask部署" class="headerlink" title="Flask部署"></a>Flask部署</h3><h4 id="1、编写基本配置"><a href="#1、编写基本配置" class="headerlink" title="1、编写基本配置"></a>1、编写基本配置</h4><p>Flask部署 可以参考 Django的部署过程，我们根据Django理论，Flask框架也支持WSGI协议，则也可以使用uWsgi服务器来作为web应用服务器。</p>
<p>我们只需要修改ini配置文件</p>
<p>需要进入项目下进行环境的打包</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pip freeze &gt; requirement.txt</span><br></pre></td></tr></table></figure>
<p>由于需要wsgi协议来配置应用服务器，我们需要新建一个uwsgi.ini文件配置服务器</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">[uwsgi]</span><br><span class="line">socket = 172.24.10.233:3030     #用来映射的端口</span><br><span class="line">chdir = /home/flask_nginx/Students/     #项目根目录路径</span><br><span class="line">wsgi-file = Students/main.py        #项目文件路径</span><br><span class="line">callable = app  # 这里需要app</span><br><span class="line">processes = 4   # 开启的进程数</span><br><span class="line">threads = 2     # 线程数</span><br></pre></td></tr></table></figure>
<h4 id="2、云主机运行测试"><a href="#2、云主机运行测试" class="headerlink" title="2、云主机运行测试"></a>2、云主机运行测试</h4><p>与django一样，创建一个专属于flask项目的文件夹，来存放你的flask项目</p>
<p>我的是在云主机的home目录下创建</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mkdir flask_nginx</span><br></pre></td></tr></table></figure>
<p>我们把项目通过filezilla本地连接云主机传入项目到flask_nginx目录下</p>
<p>之后下载所需要的环境</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pip3 install -r requirement.txt</span><br></pre></td></tr></table></figure>

<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">export FLASK_APP=main.py  # 指定flask项目运行文件</span><br><span class="line">flask run  --host=0.0.0.0   # 启动项目</span><br></pre></td></tr></table></figure>
<p>项目运行没问题后就可以部署flask了</p>
<h4 id="3、项目映射nginx"><a href="#3、项目映射nginx" class="headerlink" title="3、项目映射nginx"></a>3、项目映射nginx</h4><p>我们首先进入nginx目录配置下</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">cd /usr/local/nginx/conf/conf # 这是我存放一些配置文件的目录</span><br></pre></td></tr></table></figure>
<p>在nginx.conf主配置中导入所有子配置(如果已经配置请忽略此步骤)</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">include /usr/local/nginx/conf/conf/*.conf;</span><br></pre></td></tr></table></figure>
<p>cd 进入新建的conf中配置flask.conf</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">cd conf</span><br><span class="line"></span><br><span class="line">vi flask.conf</span><br></pre></td></tr></table></figure>

<p>在flask.conf中做以下配置</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line">server &#123;</span><br><span class="line">    listen       5000;    # 端口监听5000,(可以自由设置，但请确保该端口的防火墙已开启)</span><br><span class="line">    server_name  localhost;</span><br><span class="line"></span><br><span class="line">    #charset koi8-r;</span><br><span class="line">    #access_log  /var/log/nginx/host.access.log  main;</span><br><span class="line"></span><br><span class="line">    location / &#123;</span><br><span class="line">       include  uwsgi_params;</span><br><span class="line">       uwsgi_pass 172.24.10.233:3030;   # 映射端口，要与配置内网IP和端口一致</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    #error_page  404              /404.html;</span><br><span class="line"></span><br><span class="line">    # redirect server error pages to the static page /50x.html</span><br><span class="line">    #</span><br><span class="line">    error_page   500 502 503 504  /50x.html;</span><br><span class="line">    location = /50x.html &#123;</span><br><span class="line">        root   /usr/share/nginx/html;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br></pre></td></tr></table></figure>
<p>完成后进入项目的uwsgi.ini配置的目录，重启</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">uwsgi --ini uwsgi.ini &amp;</span><br></pre></td></tr></table></figure>
<p>重启nginx服务</p>
<figure class="highlight shell"><figcaption><span>script</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">systemctl restart nginx</span><br></pre></td></tr></table></figure>
<h4 id="4、补充"><a href="#4、补充" class="headerlink" title="4、补充"></a>4、补充</h4><p>由于我在前端访问我的flask项目会出现一个错误</p>
<p><strong>RuntimeError: cryptography is required for sha256_password or caching_sha2_password</strong></p>
<p>于是我又安装了cryptography</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">pip3 install cryptography</span><br></pre></td></tr></table></figure>
<p>nice！这个问题成功解决了</p>
<hr>
<p>最后如果要更改数据库的配置不要忘了将你的flask项目的settings文件更改你要使用的数据库</p>

      
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